The user story's size of 21 points indicates it is an epic, which is too large and complex to be handled in a single development cycle. The best practice is to break it down into smaller, more manageable stories that can be developed and tested incrementally. This reduces risk and provides value sooner.

Furthermore, the story involves a dependency on an external third-party team. This introduces significant coordination and communication risks. Establishing and maintaining a regular communication schedule is a critical step to manage this dependency, align technical efforts, resolve blockers, and ensure both teams are synchronized throughout the development process.

A. Acquiring testing steps is a standard activity for any story, not a specific strategy to manage the high complexity and external dependency highlighted in this scenario.

B. Identifying UAT testers occurs later in the lifecycle. It does not address the immediate challenges of making a large, complex story ready for effective development.

1. Appian Delivery Methodology

Backlog: Official Appian documentation emphasizes that large bodies of work

or epics

should be broken down into smaller stories. It states

"Epics are large bodies of work that can be broken down into a number of smaller stories... A story is a small

self-contained unit of work." A 21-point item is considered an epic and must be decomposed.

2. Appian Delivery Methodology

Risk Management: Managing external dependencies is a key aspect of project risk management. The methodology implicitly supports establishing clear communication channels as a primary mitigation strategy for risks associated with third-party integrations

ensuring alignment and timely issue resolution. While not a single document

this principle is woven into Appian's agile delivery approach.